عنوان تحقیق : طبقه بندی صابون ها و مواد مغذی تعداد صفحات : 68 زبان : انگلیسی فرمت فایل : word بخش هایی از متن تحقیق : INTRODUCTION Historical Background Firstsynthetic detergents were produced in Germany in World War ndash;I when animal fats were diverted to other wartime uses and were unavailable for soap manufacture. The first synthetics were short chain alkyl naphthalene sulphonates. ...